Glass-drawing apparatus.



0. E. MAYNARD. GLASS DRAWING APPARATUS. APPLICATION FILED JUNE 30,1911.

1,]. 1 4,897. Patented Oct. 27, 1914;.

2 SHEBTSSHEET 1.

F Z. 1:524 =2. 2 v P 2111 'INVENTOR O. \(n cult WITNESSES O. E. MAYNARD.

GLASS DRAWING APPARATUS.

APPLICATION FILED JUNE 30,1911.

1,1 1 4,897 Patented Oct. 27, 1914.

2 SHEETS-SHEET 2.

WITNESSES INVENTOR UNITED STATES PATENT oFFroE.

OLIVER MAYNARD, or ALEXANDRIA, trNn'IANA, ASSIGNOR T0 WINDOW GLASS MACHINE GOMI'AN'Y, OF NEW JERSEY.

rrrrsnnaen, PENNSYLVANIA, A CORPORATION or GLASS-DRAWING APPARATUS.

To all whom it may concern:

Be it known that I, OLIVER E. MAYNAnn, a resident of Alexandria, in the county of Madison and State of Indiana, have invented a new and usefullmprovement in Glass- Drawing Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in

which- Figure 1 is a side elevation'partly broken away, showing one form of my improved apparatus; Fig. 2 is a detail end elevation of the drums; Fig. 3 is aside elevation of the drums and shaft, the shaft being partly broken away; Fig. 4 is a view similar to Fig. 2, showing the parts in position after capping; and Fig. 5 is a detail view of a relief valve which I prefer to employ.

In the drawing of glass cylinders from a bath of molten glass, such ascylinders for forming rollers to be cracked and flattened into window glass,

- neck lS. fiI'St formed, and then'the walls of the draw,

the glass are expanded outwardly to the si ze'desired' for the cylinder. The cylinder' is then drawn upwardly while maintaining substantially the same diameter through inthe formingof window glass rollers. The forming of the neck and cap has heretofore. been done by hand manipuplied to drawing ap erly controlled for these lation of the control valves for the air and this operation has required considerable skill'and practiceon the part of the operator.

My invention is designed to provide a' cap-fonning attachment which'may be aparatus'of this general .character, and whic, will serve to control the air supply to the interior of thearticle being drawn in .such a way as to automati cally form the cap and then proceed with drawing the cylinder, the air being propur o'ses and being proportioned to the spec o the draw.

' *In the drawings, in which I show my in-- vention as applied to the usual apparatus employed in drawing window. glass cylm-.

ders, 2 represents an electric motor. having' its wheel provided with *a worm, which this shaft is: a toothed wheel 6 on shaft-6, which shaft also carries a pinion intermeshing with toothed Specification of Letters Patent. Application filed June 30, 1911.

'11. during the and stifi'ening of the glass. a. thick, hollow .over suitable pulleys end portion of the cord-is provided'with a.

Patented-Oct. 27, 1914. Serial No. caasca drum shaft The drum 8 carries the drum 9 on which winds wheel 7 on the shaft -the cable or flexible connection 26 by which the cage or elevator device carrying the blow-pipe or bait is mounted. This drum 9 consists of a winding portion'10 of relatively smaller diameter, and a tapered conical portion 11 of larger; diameter, these parts being connected by a curved portion 12 of rapidly increasing diameter. These parts are grooved in the usual manner to receive the cable which is secured to the smaller drum portion. The smaller portion 10 and the portion1'2 are used during the forming of the neck and cap, so that the elevator cable winds on the graduallyenlarging tapered portion drawing of the cylinder ortion proper. The object of the conical orm is to slightly increase the draw-to compensate for the gradual cooling In carrying out my invention, I s cure tothe end. of the shaft 8 a small drum 13. This is shown as having an enlarged-socket portion 14 held to the end of the shaft by; set-screw 15.' This drum. is preferably also of conical grooved shape and ,to its outer end is pivoted an arm "16 controlled. by pins 16 projecting from the end of the drum. This arm has mounted at its outer end, a grooved roller 17, to which theend of the cord or flexible connection 18 is-secured. This flexible connection is also se-f .cured to the lever 19 of a valve 20 in the air supply pipe' 21- leading to the telescopic pipe system "22, supplying air to and speed through the through the blow-pipe or baita-nd intothe cylinder being drawn.

In the form shown, the. valve lever 19 is provided with a weight 23, which tends to draw it toward closed position by gravity,

and in the form shown the; cord 18 leads or sheaves .24. The

take-up device 25.01: an-ordinary character.

'. Fig. 2 shows the position of the. arm 16' at the time when ,the bait has, been lowered into the bath and before the start ofitho drawing operation. At this time, the-leiferp is ,pnly slightly open; Thedrawingoporw winding upon the small portion it? of the larger drum. Through the first part of the first revolution of the drum, one pin 16 which is holding the lever 18 in the position shown in Fig. 2 moves over to the right, thereby releasing said lever 16. The latter is now drawn up to the vertical position shown in Fig. 1 by the action of the weight 28. During this portion of the operation, the air valve slightly closes until the lever arm is in a vertical position. The opening of the valve at this time is just sufficient to keep enough air pressure in the blow pipe to prevent the glass penetrating too far into the opening of the blow pipe, and thus rendeiitimpcssible to expel the portion not adhering tothe inner walls of the blowpipe with the ordinary blowing pressure at the beginning of the blowing operation. It also serves to furnish suiiicient air to blow the neck of the cylinder as the bait leaves the bath. The lever "lo-remains in its vertical position until the other pin 16 has been carried around by. the-rotation of the so as-to contact with the opposite side of the lever. it is -durii'ig this period that the ncclr is formed. The lever is now moved by this other pin 16 to the position shown Fig, hand during this movement, the air valve is being rapidly opened. In the meantime, the cord 26 has commenced to wind'upon the portion 12 of the main drum, so as to increase the speed oi the draw. During substantially the whole period of the cap torming operation, the cable 26 is "windin on the part of the drum. While the cable 26 is Winding over the part 12, the

cord or cable 18 is winding over the smaller drumlfir- "lower mg the bait into the bath prior to "beginning the draw, the main cable 18. will be imwound on the smaller portion 10 of e um and the lever 16 will be moved lbeckwardly to the position shown in Fig. 2, and will thus open the air valve somewhat to open up the glass from the bait. From this position of the lever to its vertical upright position, the air will be gradually de- E il? creased although not completely shut off.

lln the use of this' attachment, I have toundjthal? a smaller amount of air should i'cxhaust' duringthe cap-forming operation than'durin the drawing of the cylinder. Consequent instead of using the ordinary vent hole, which is now employed, and which is opened after the cap-is formed, I employa special valve which is provided. with two openings of dificrent sizes. The

smaller opening is thrown open during the cap-forming otter-which l draw the valve soas to open the larger opening and allow a greater exhaust during the cylinder drawting. Tn the form shown, it provide an escapevalve 2?, which is shown as n'iounted on a branch pipe leading from the mail;

mation of the neck supply pipe 21, this valve having two sop arate openings a and Z), of which the opening a is smaller than the opening 6.

The valve stem is shown as provided with lever 1 arms connected by cords or flexible connections 30 with a three armed hand lever by which the valve may be thrown osition. This valve is shown in to either detail in *ig. 5. The operator will throw the valve into the position where the small hole will exhaust the atmosphere during'the cap -i'orming operation and thereafter he will throw it in position where the opening 6 will exhaust the atmosphere and allow it to remain in this, position during the drawing oi the cylinder proper.

The advantages of my invention will be obvious to those skilled in the art, since the hand regulation of the air and the forming of the cap by manipulation of the speed of the cage and the air are avoided, and thus the amount of labor is'greatly lessened.

With my improved attachment one operator may tend to several machines. The cost of the product is thus considerably decreased and the operations are made more accurate and uniform. Other factors being the same, cylinders will be formed of approximately the same size. By the provision ofmeans such as the drum 13 having an increasing diameter proportional to the increasing diameter of the drum 9, the increase in air supply can be made proportional to the increase in the drawing speed. This is an im portant, and I believe, broadly novel feature.

Many variations may be made in the form and arrangement of the apparatus without 1 departing from my invention, since 1 consider myself the first to devise an automatic attachment for forming the cap in drawinghollow glass articles.

I claim:

ice

1. ln apparatus""for the manufacture of drawn glass cylinders, the combination with a blow pipe or bait, of actuating mechanism therefor, said pipe having a control alve, and connections between the actuating mechanisni and the control valve for automatically moving the valve, said connections comprising means which effect a relatively slight opening of the valve during the for V ortion of the cylinder, a rapid opening of t e valve during the capforming period, and a gradual opening thereoit' during theiformation of the cylinder proper,'--said actuating mechanism having means for controlling the drawing speed of the blow pipe or bait in timed relation to changes in the position of said valve; substantially as described.

2, ln apparatus for the manufacture of drawn glass cylinders, the combinationwith a blow pipe or bait, of actuating mechanism therefor, said pipe having a control valve, and connections between the actuating mechmatioally moving'the valve, said connecslight openin mation of the neck tlons comprismg means which effect a relatively slight openin of the valve during the formation of t e neck portion of the cylinder, a rapid opening of the valve during the cap-forming period, and a gradual opening thereof during the formation of the cylinder proper, said actuating mechanism having means for controlling the drawing speed of the blow pipe or bait to ive an increase in speed thereof proportional to the increased opening of the air control valve during the formation of the cylinder proper; substantially as described.

3. In apparatus for the drawn glass cylinders, the combination with a blow pipe or bait, of actuating mechanisln therefor, said pipe having a control valve, and connections between the actuating mechanism and the control valve for automatically moving the valve, said connections comprising meal? lwhich effect a relatively o -t e manufacture of Iportion of the cylinder, a rapid opening of t e' valve during the capforming period, and a gradual opening thereof during the formation of the cylinder proper, said actuating means for controlling of the blow pipe or bait in timed relation to changes in the position of said valve, together with a supply connection for said blow pipe or bait, said connection'having a relief port and a relief valve controlling mechanism. having the drawing speed said port, said valve having meansfor permitting the escape of less="air during the cap-forming eriod than during the formation of the cy inder proper; substantially as described,

4. In apparatus for drawing glass cylinders, a blow pipe or bait, and an air supply connection therefor, said connection having a relief valve, and said valvehavin two definite operating positions, one of sai positions, which gives a relatively small relief valve during the for period, and a openlng, being for use while drawing the cap portion of a cylinder, and the other posibody portion of the cylinder; substantially as described. I

5. In apparatus for drawing glass cylinders, the combination with a blow pipe or bait, of actuating mechanism' therefor, an air supply leading to said pipe, a control valve for the air, and connections between the actuating mechanism and the control,

valve for automatically moving said valve, said connections comprising mechanism effecting a relatively slightopening of the valve during the formation of the neck portion of the cylinder and an automatic rapid opening of the valve during the cap-forming period, said ing means for controlling the drawing speed of the blow pipe or bait in timed relation to changes in'the position stantially as described. y

In apparatus for the manufacture of drawn glass cylinders, the combination with a blow-pipe or bait, of actuating means therefor, said pipe having a control valve, and connections between the actuating means and the control valve for automatically moving the valve, said connections comprising means which effect a relatively slight 0 ening of the valve during the formation 0 the neck portion of the cyllnder, a rapid opening (of the valve during the cap-forming gradual opening ing the formation of the cy and the bait or blow-pipe-actuating means having an element which gives a sudden increase in speed after the rapid o ening of the air control valve, substantia y as de scribed. i l

In testimony whereof, I have hereunto set my hand 7 o. E. MAYNARD. Witnesses:

A. F. T1nBn'1"rs, H. M. Conwm.

actuating mechanism hav thereof dur-w inder proper,

of said valve, sub- 

